using RealTimeGraphX.EventArguments;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;

namespace RealTimeGraphX
{
    /// <summary>
    /// Represents a graph painter that can be connected as an <see cref="IGraphRenderer"/> output.
    /// The graph painter will receive data points from the graph renderer and paint the graph.
    /// The final result will be passed to the output <see cref="IGraphSurface"/>.
    /// </summary>
    /// <seealso cref="RealTimeGraphX.IGraphComponent" />
    /// <seealso cref="RealTimeGraphX.IGraphOutputComponent{RealTimeGraphX.IGraphSurface}" />
    public interface IGraphPainter : IGraphComponent, IGraphOutputComponent<IGraphSurface>
    {
        #region Events

        /// <summary>
        /// Occurs when the current painter transformation (Scale/Translate) has changed.
        /// </summary>
        event EventHandler<TransformChangedEventArgs> TransformChanged;

        /// <summary>
        /// Occurs when the current virtual (effective minimum/maximum after transformation) x-axis minimum/maximum has changed.
        /// </summary>
        event EventHandler<RangeChangedEventArgs> VirtualRangeXChanged;

        /// <summary>
        /// Occurs when the current virtual (effective minimum/maximum after transformation) y-axis minimum/maximum has changed.
        /// </summary>
        event EventHandler<RangeChangedEventArgs> VirtualRangeYChanged;

        #endregion

        #region Properties

        /// <summary>
        /// Gets the current virtual (effective minimum/maximum after transformation) x-axis minimum.
        /// </summary>
        GraphDataPointBase VirtualMinimumX { get; }

        /// <summary>
        /// Gets the current virtual (effective minimum/maximum after transformation) x-axis maximum.
        /// </summary>
        GraphDataPointBase VirtualMaximumX { get; }

        /// <summary>
        /// Gets the current virtual (effective minimum/maximum after transformation) y-axis minimum.
        /// </summary>
        GraphDataPointBase VirtualMinimumY { get; }

        /// <summary>
        /// Gets the current virtual (effective minimum/maximum after transformation) y-axis maximum.
        /// </summary>
        GraphDataPointBase VirtualMaximumY { get; }

        /// <summary>
        /// Gets the last zooming rectangle that was passed on <see cref="SetZoomRect(GraphRect)"/>.
        /// </summary>
        GraphRect ZoomRect { get; }

        /// <summary>
        /// Gets the current painter transform object.
        /// The transform object is constructed based on the current <see cref="ZoomRect"/>.
        /// </summary>
        GraphTransform Transform { get; }

        /// <summary>
        /// Gets the width of the connected output surface.
        /// </summary>
        double SurfaceWidth { get; }

        /// <summary>
        /// Gets the height of the connected output surface.
        /// </summary>
        double SurfaceHeight { get; }

        #endregion

        #region Methods

        /// <summary>
        /// Sets the painter zooming rectangle.
        /// The zoom rectangle must be smaller than the size of the connected <see cref="IGraphSurface"/> size.
        /// </summary>
        /// <param name="rect">The rectangle.</param>
        void SetZoomRect(GraphRect rect);

        /// <summary>
        /// Resets the painter zooming rectangle.
        /// </summary>
        void ResetZoomRect();

        #endregion
    }

    /// <summary>
    /// Represents a graph painter that can be connected as an <see cref="IGraphRenderer"/> output.
    /// The graph painter will receive data points from the graph renderer and paint the graph.
    /// The final result will be passed to the output <see cref="IGraphSurface"/>.
    /// </summary>
    /// <typeparam name="TDataSeries">The type of the graph data series.</typeparam>
    /// <seealso cref="RealTimeGraphX.IGraphComponent" />
    /// <seealso cref="RealTimeGraphX.IGraphInputComponent{RealTimeGraphX.IGraphRenderer}" />
    /// <seealso cref="RealTimeGraphX.IGraphOutputComponent{RealTimeGraphX.IGraphSurface}" />
    public interface IGraphPainter<TDataSeries> : IGraphPainter, IGraphInputComponent<IGraphRenderer<TDataSeries>> where TDataSeries : IGraphDataSeries
    {
        #region Methods

        /// <summary>
        /// Draws the specified data point collection.
        /// </summary>
        /// <param name="seriesCollection">The entire series collection.</param>
        /// <param name="series">The data series.</param>
        /// <param name="points">The points.</param>
        void Draw(IEnumerable<TDataSeries> seriesCollection, TDataSeries series, IEnumerable<GraphPoint> points);

        #endregion
    }

    /// <summary>
    /// Represents a graph painter that can be connected as an <see cref="IGraphRenderer"/> output.
    /// The graph painter will receive data points from the graph renderer and paint the graph.
    /// The final result will be passed to the output <see cref="IGraphSurface"/> via the <see cref="IGraphPainter{TImage}.PaintingCompleted"/> event.
    /// </summary>
    /// <typeparam name="TImage">The type of the image.</typeparam>
    /// <typeparam name="TDataSeries">The type of the graph data series.</typeparam>
    /// <seealso cref="RealTimeGraphX.IGraphComponent" />
    /// <seealso cref="RealTimeGraphX.IGraphInputComponent{RealTimeGraphX.IGraphRenderer}" />
    /// <seealso cref="RealTimeGraphX.IGraphOutputComponent{RealTimeGraphX.IGraphSurface}" />
    public interface IGraphPainter<TDataSeries, TImage> : IGraphPainter, IGraphPainter<TDataSeries> where TDataSeries : IGraphDataSeries
    {
        #region Events

        /// <summary>
        /// Occurs when the painter has a new graph image available.
        /// </summary>
        event EventHandler<PaintingCompletedEventArgs<TImage>> PaintingCompleted;

        #endregion

        #region Properties

        /// <summary>
        /// Gets the current graph image.
        /// </summary>
        TImage Image { get; }

        #endregion
    }
}